/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.solr.internal.csv.writer;

import java.io.Writer;
import java.util.Arrays;
import java.util.Map;

/**
 * CSVWriter
 * 
 * @author Martin van den Bemt
 * @version $Id: $
 */
public class CSVWriter {

	/** The CSV config **/
	private CSVConfig config;
	/** The writer **/
	private Writer writer;

	/**
     * 
     */
	public CSVWriter() {
	}

	public CSVWriter(CSVConfig config) {
		setConfig(config);
	}

	public void writeRecord(Map map) {
		CSVField[] fields = config.getFields();
		try {
			StringBuffer sb = new StringBuffer();
			for (int i = 0; i < fields.length; i++) {
				Object o = map.get(fields[i].getName());
				if (o != null) {
					String value = o.toString();
					value = writeValue(fields[i], value);
					sb.append(value);
				}
				if (!config.isDelimiterIgnored() && fields.length != (i + 1)) {
					sb.append(config.getDelimiter());
				}
			}
			if (config.isEndTrimmed()) {
				for (int i = sb.length() - 1; i >= 0; i--) {
					System.out.println("i : " + i);
					if (Character.isWhitespace(sb.charAt(i))) {
						sb.deleteCharAt(i);
					} else {
						break;
					}
				}
			}
			sb.append("\n");
			String line = sb.toString();
			writer.write(line);
		} catch (Exception e) {
			e.printStackTrace();
		}
	}

	protected String writeValue(CSVField field, String value) throws Exception {
		if (config.isFixedWidth()) {
			if (value.length() < field.getSize()) {
				int fillPattern = config.getFill();
				if (field.overrideFill()) {
					fillPattern = field.getFill();
				}
				StringBuffer sb = new StringBuffer();
				int fillSize = (field.getSize() - value.length());
				char[] fill = new char[fillSize];
				Arrays.fill(fill, config.getFillChar());
				if (fillPattern == CSVConfig.FILLLEFT) {
					sb.append(fill);
					sb.append(value);
					value = sb.toString();
				} else {
					// defaults to fillpattern FILLRIGHT when fixedwidth is used
					sb.append(value);
					sb.append(fill);
					value = sb.toString();
				}
			} else if (value.length() > field.getSize()) {
				// value to big..
				value = value.substring(0, field.getSize());
			}
			if (!config.isValueDelimiterIgnored()) {
				// add the value delimiter..
				value = config.getValueDelimiter() + value
						+ config.getValueDelimiter();
			}
		}
		return value;
	}

	/**
	 * @return the CVSConfig or null if not present
	 */
	public CSVConfig getConfig() {
		return config;
	}

	/**
	 * Set the CSVConfig
	 * 
	 * @param config
	 *            the CVSConfig
	 */
	public void setConfig(CSVConfig config) {
		this.config = config;
	}

	/**
	 * Set the writer to write the CSV file to.
	 * 
	 * @param writer
	 *            the writer.
	 */
	public void setWriter(Writer writer) {
		this.writer = writer;
	}

}
